1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.maven.api;
20
21 import org.apache.maven.api.annotations.Consumer;
22 import org.apache.maven.api.annotations.Experimental;
23 import org.apache.maven.api.annotations.Nonnull;
24
25 /**
26 * A listener for session events.
27 * TODO: open this to other events like similar to {@code org.apache.maven.eventspy.EventSpy}
28 *
29 * @since 4.0
30 */
31 @Experimental
32 @FunctionalInterface
33 @Consumer
34 public interface Listener {
35 void onEvent(@Nonnull Event event);
36 }